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https://github.com/ivellioscolin/pykd.git
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137 lines
5.0 KiB
Python
137 lines
5.0 KiB
Python
"""Debug events handler: test exceptions and debug breaks"""
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import unittest
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import target
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import pykd
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class BreakExceptionHandler(pykd.eventHandler):
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"""Track load/unload module implementation"""
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def __init__(self, client):
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pykd.eventHandler.__init__(self, client)
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self.client = client
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self.wasSecondChance = False
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self.wasBreakpoint = False
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self.wasBreakpointIds = []
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self.bpLastModuleName = ""
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self.bpCount = 0
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self.firstChanceAccessAddresses = []
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self.secondChanceAccessAddresses = []
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def onBreakpoint(self, bpId):
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"""Breakpoint handler"""
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self.wasBreakpoint = True
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self.wasBreakpointIds.append( bpId )
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return pykd.DEBUG_STATUS_BREAK
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def onException(self, exceptParams):
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"""Exception handler"""
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self.wasSecondChance = not exceptParams["FirstChance"]
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if exceptParams["Code"] == pykd.EXCEPTION_ACCESS_VIOLATION:
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if self.wasSecondChance:
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self.secondChanceAccessAddresses.append( exceptParams["Parameters"][1] )
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else:
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self.firstChanceAccessAddresses.append( exceptParams["Parameters"][1] )
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elif exceptParams["Code"] == pykd.EXCEPTION_BREAKPOINT:
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self.bpCount += 1
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return pykd.DEBUG_STATUS_BREAK
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class BpHandlerTestResult:
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""" Breakpoint handler test results"""
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def __init__(self):
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self.wasCodeBp = None
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self.wasDataBp = None
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bpHandlerTestResult = BpHandlerTestResult()
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def codeBpHandler(bpId):
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""" Handler of software breakpoint """
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bpHandlerTestResult.wasCodeBp = bpId
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def dataBpHandler(bpId):
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""" Handler of hardware breakpoint """
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bpHandlerTestResult.wasDataBp = bpId
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return pykd.DEBUG_STATUS_NO_CHANGE
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class EhExceptionBreakpointTest(unittest.TestCase):
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"""Unit tests of exceptions end breakpoint handling"""
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def testBreakpointException(self):
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"""Start new process and track exceptions/breakpoints"""
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testClient = pykd.createDbgClient()
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testClient.startProcess( target.appPath + " -testExceptions" )
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targetMod = testClient.loadModule( "targetapp" )
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bpIdSoftware = testClient.setBp( targetMod.offset("changeValueForAccessTesting"),
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codeBpHandler )
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allBp = testClient.getAllBp()
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self.assertEqual( 1, len( allBp ) )
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self.assertTrue( bpIdSoftware in allBp )
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hwBpIsNotSet = True
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# kd> ba e 1 <some_address>
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# ^ Unable to set breakpoint error
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# The system resets thread contexts after the process
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# breakpoint so hardware breakpoints cannot be set.
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# Go to the executable's entry point and set it then.
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# raw_input("Press <ENTER>....")
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breakExceptionHandler = BreakExceptionHandler( testClient )
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while not breakExceptionHandler.wasSecondChance:
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testClient.go()
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if hwBpIsNotSet:
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hwBpIsNotSet = False
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bpIdHwExecute = testClient.setBp( targetMod.offset("readValueForAccessTesting"),
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1, pykd.DEBUG_BREAK_EXECUTE )
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bpIdHwWrite = testClient.setBp( targetMod.offset("g_valueForAccessTesting1"),
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1, pykd.DEBUG_BREAK_WRITE, dataBpHandler )
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bpIdHwRead = testClient.setBp( targetMod.offset("g_valueForAccessTesting2"),
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1, pykd.DEBUG_BREAK_READ )
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self.assertTrue( bpIdSoftware != bpIdHwExecute and
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bpIdHwExecute != bpIdHwWrite and
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bpIdHwWrite != bpIdHwRead )
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allBp = testClient.getAllBp()
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self.assertEqual( 4, len( allBp ) )
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self.assertTrue( bpIdSoftware in allBp )
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self.assertTrue( bpIdHwExecute in allBp )
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self.assertTrue( bpIdHwWrite in allBp )
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self.assertTrue( bpIdHwRead in allBp )
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self.assertEqual( [2, 3], breakExceptionHandler.firstChanceAccessAddresses )
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self.assertEqual( 3, breakExceptionHandler.bpCount ) # main and 2 in doExeptions
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self.assertEqual( [3, ], breakExceptionHandler.secondChanceAccessAddresses )
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self.assertTrue( breakExceptionHandler.wasBreakpoint )
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self.assertTrue( bpIdSoftware in breakExceptionHandler.wasBreakpointIds )
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self.assertTrue( bpIdHwExecute in breakExceptionHandler.wasBreakpointIds )
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self.assertTrue( bpIdHwWrite in breakExceptionHandler.wasBreakpointIds )
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self.assertTrue( bpIdHwRead in breakExceptionHandler.wasBreakpointIds )
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testClient.removeBp(bpIdHwRead)
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self.assertEqual( 3, len( testClient.getAllBp() ) )
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testClient.removeBp()
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self.assertEqual( 0, len( testClient.getAllBp() ) )
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self.assertEqual( bpHandlerTestResult.wasCodeBp, bpIdSoftware )
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self.assertTrue( bpHandlerTestResult.wasDataBp, bpIdHwWrite )
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